Acids

Q. Which of the following gives the correct increasing order of acidic strength?
(a) Water < Acetic Acid< Hydrochloric Acid
(b) Water < Hydrochloric Acid < Acetic Acid
(c) Acetic Acid < Water < Hydrochloric Acid
(d) Hydrochloric Acid < Water < Acetic Acid

Q.

What will be the color acquired by Na₂CO₃ solution when a few drops of methyl orange are added to it?

Q. What will be the pH value of the strongest base?

1. 14

Q.

Lemon juice and vinegar taste ___________ because they contain ___________.

Q. Match the following acids with their usage.

1. Battery
2. Cleaning metals
3. Yoghurt
4. Vinegar

Q. Which of these is an olfactory indicator?

1. Beetroot
2. Turmeric
3. Clove
4. Red cabbage

Q. Give the names and formulae of the two substances in each case (c) Liquid drying agent.

Q. Curd is a natural source of which acid?

1. Acetic acid
2. Lactic acid
3. Citric acid
4. Oxalic acid

Q. Lemons contain citric acid.

1. False
2. True

Q. While diluting an acid, why is it recommended that the acid should be added to water and not water to acid?​

Q. Answer the following question:
(a) What happens when a dilute acid reacts with a metal oxide? Explain with the help of an example.
(b) Do metal oxides react with bases too? If yes, give an example.

Q. Which amongst the following is a weak acid?

1. Lactic acid
2. Both b and c
3. Nitric acid
4. Acetic acid

Q. In a ________ solution, the amount of solute is very less.

1. saturated
2. concentrated
3. dilute
4. supersaturated

Q. a)What is a chemical reaction?
b)State the conditions necessary for a chemical change or reaction.

Q. Lemons contain citric acid.

1. False
2. True

Q.

Pick the strongest acid from the folllowing options.

1. Acetic acid

2. Oxalic acid

3. Nitric acid

4. Citric acid

Q. Litmus papers are generally available in _____ and ______ colours.

1. blue, black
2. red, blue
3. blue, pink
4. red, pink

Q. Distilled water is a conductor of electricity.

1. poor
2. moderate
3. good

Q. Litmus papers are generally available in _____ and ______ colours.

1. red, pink
2. red, blue
3. blue, black
4. blue, pink